20724480

素因数分解:

$2^8\times 3^2\times 5^1\times 7^1\times {\mathrm{257}}^1$

素因数の和:291

約数の個数: 216

約数和(自身を含む): 82266912

約数和(自身を除く): 61542432

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 24, 28, 30, 32, 35, 36, 40, 42, 45, 48, 56, 60, 63, 64, 70, 72, 80, 84, 90, 96, 105, 112, 120, 126, 128, 140, 144, 160, 168, 180, 192, 210, 224, 240, 252, 256, 257, 280, 288, 315, 320, 336, 360, 384, 420, 448, 480, 504, 514, 560, 576, 630, 640, 672, 720, 768, 771, 840, 896, 960, 1008, 1028, 1120, 1152, 1260, 1280, 1285, 1344, 1440, 1542, 1680, 1792, 1799, 1920, 2016, 2056, 2240, 2304, 2313, 2520, 2570, 2688, 2880, 3084, 3360, 3598, 3840, 3855, 4032, 4112, 4480, 4626, 5040, 5140, 5376, 5397, 5760, 6168, 6720, 7196, 7710, 8064, 8224, 8960, 8995, 9252, 10080, 10280, 10794, 11520, 11565, 12336, 13440, 14392, 15420, 16128, 16191, 16448, 17990, 18504, 20160, 20560, 21588, 23130, 24672, 26880, 26985, 28784, 30840, 32382, 32896, 35980, 37008, 40320, 41120, 43176, 46260, 49344, 53970, 57568, 61680, 64764, 65792, 71960, 74016, 80640, 80955, 82240, 86352, 92520, 98688, 107940, 115136, 123360, 129528, 143920, 148032, 161910, 164480, 172704, 185040, 197376, 215880, 230272, 246720, 259056, 287840, 296064, 323820, 328960, 345408, 370080, 431760, 460544, 493440, 518112, 575680, 592128, 647640, 690816, 740160, 863520, 986880, 1036224, 1151360, 1295280, 1381632, 1480320, 1727040, 2072448, 2302720, 2590560, 2960640, 3454080, 4144896, 5181120, 6908160, 10362240, 20724480]

約数ペア:

[(1, 20724480), (2, 10362240), (3, 6908160), (4, 5181120), (5, 4144896), (6, 3454080), (7, 2960640), (8, 2590560), (9, 2302720), (10, 2072448), (12, 1727040), (14, 1480320), (15, 1381632), (16, 1295280), (18, 1151360), (20, 1036224), (21, 986880), (24, 863520), (28, 740160), (30, 690816), (32, 647640), (35, 592128), (36, 575680), (40, 518112), (42, 493440), (45, 460544), (48, 431760), (56, 370080), (60, 345408), (63, 328960), (64, 323820), (70, 296064), (72, 287840), (80, 259056), (84, 246720), (90, 230272), (96, 215880), (105, 197376), (112, 185040), (120, 172704), (126, 164480), (128, 161910), (140, 148032), (144, 143920), (160, 129528), (168, 123360), (180, 115136), (192, 107940), (210, 98688), (224, 92520), (240, 86352), (252, 82240), (256, 80955), (257, 80640), (280, 74016), (288, 71960), (315, 65792), (320, 64764), (336, 61680), (360, 57568), (384, 53970), (420, 49344), (448, 46260), (480, 43176), (504, 41120), (514, 40320), (560, 37008), (576, 35980), (630, 32896), (640, 32382), (672, 30840), (720, 28784), (768, 26985), (771, 26880), (840, 24672), (896, 23130), (960, 21588), (1008, 20560), (1028, 20160), (1120, 18504), (1152, 17990), (1260, 16448), (1280, 16191), (1285, 16128), (1344, 15420), (1440, 14392), (1542, 13440), (1680, 12336), (1792, 11565), (1799, 11520), (1920, 10794), (2016, 10280), (2056, 10080), (2240, 9252), (2304, 8995), (2313, 8960), (2520, 8224), (2570, 8064), (2688, 7710), (2880, 7196), (3084, 6720), (3360, 6168), (3598, 5760), (3840, 5397), (3855, 5376), (4032, 5140), (4112, 5040), (4480, 4626)]